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K\"ahler-Ricci flow and conformal submersion

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arxiv 2301.13065 v1 pith:PWZTBOK5 submitted 2023-01-30 math.DG

K\"ahler-Ricci flow and conformal submersion

classification math.DG
keywords conformalflowsubmersionahlerahler-ricciciteformationhomothetic
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We study singularity formation of K\"ahler-Ricci flow on a K\"ahler manifold that admits a horizontally homothetic conformal submersion into another K\"ahler manifold. We will derive necessary and sufficient conditions for the preservation of horizontally homothetic conformal submersion along the flow and establish the formation of type I singularity together with a standard splitting of the Cheeger-Gromov limit. This generalizes the setup of Calabi symmetry that was discussed in \cite{1} and \cite{2}, thus gives new proofs for the results listed there.

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